Abstract

At the German Space Operations Center of the DLR a new launch window program (LAUWIN) was developed for multi-burn geostationary transfer missions. At the present version, the program processes the following types of constraints for the launch window: - Forbidden Earth or moon shadows. - Maximum duration of Earth or monn shadows. - Forbidden sun aspect angles within a satellite coodinate system. - Forbidden Earth/moon interferences during Earth acquisition scans. - Forbbiden sun colinearities (angles sun-Earth-satellite). - Forbidden Earth-satellite-moon angles.